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| author | Eric Biggers <ebiggers@google.com> | 2019-10-21 16:30:43 -0700 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2019-10-25 14:04:47 -0700 |
| commit | 9aa30c254dd57df54f00c5d520b7ac867ad7ca68 (patch) | |
| tree | 59da580e4b5a3a72a6bac6965f75bc43d0005cc1 /lib/ext2fs | |
| parent | 47cba40d11aa6ae054df057ea84bf3169ad99ab7 (diff) | |
| download | e2fsprogs-9aa30c254dd57df54f00c5d520b7ac867ad7ca68.tar.gz | |
BACKPORT, FROMLIST: Support the stable_inodes feature
Reserve the codepoint for EXT4_FEATURE_COMPAT_STABLE_INODES, allow it to
be set and cleared, and teach resize2fs to forbid shrinking the
filesystem if it is set.
This feature will allow the use of encryption policies where the inode
number is included in the IVs (initialization vectors) for encryption,
so data would be corrupted if the inodes were to be renumbered.
For more details, see the kernel patchset:
https://lkml.kernel.org/linux-fsdevel/20191021230355.23136-1-ebiggers@kernel.org/T/#u
(cherry-picked from https://lkml.kernel.org/linux-ext4/20191021233043.36225-1-ebiggers@kernel.org
and resolved conflicts with this branch not having the fast_commit feature yet.)
Change-Id: Ib100eec48d3fe990ef5df5823b0aaca7b74f039d
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'lib/ext2fs')
| -rw-r--r-- | lib/ext2fs/ext2_fs.h | 2 | ||||
| -rw-r--r-- | lib/ext2fs/ext2fs.h | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h index cbb44bdb..c303ff44 100644 --- a/lib/ext2fs/ext2_fs.h +++ b/lib/ext2fs/ext2_fs.h @@ -810,6 +810,7 @@ struct ext2_super_block { /* #define EXT2_FEATURE_COMPAT_EXCLUDE_INODE 0x0080 not used, legacy */ #define EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP 0x0100 #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 +#define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 @@ -911,6 +912,7 @@ EXT4_FEATURE_COMPAT_FUNCS(dir_index, 2, DIR_INDEX) EXT4_FEATURE_COMPAT_FUNCS(lazy_bg, 2, LAZY_BG) EXT4_FEATURE_COMPAT_FUNCS(exclude_bitmap, 2, EXCLUDE_BITMAP) EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, 4, SPARSE_SUPER2) +EXT4_FEATURE_COMPAT_FUNCS(stable_inodes, 4, STABLE_INODES) EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, 2, SPARSE_SUPER) EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, 2, LARGE_FILE) diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h index 59fd9742..5012b50d 100644 --- a/lib/ext2fs/ext2fs.h +++ b/lib/ext2fs/ext2fs.h @@ -611,7 +611,8 @@ typedef struct ext2_icount *ext2_icount_t; EXT2_FEATURE_COMPAT_RESIZE_INODE|\ EXT2_FEATURE_COMPAT_DIR_INDEX|\ EXT2_FEATURE_COMPAT_EXT_ATTR|\ - EXT4_FEATURE_COMPAT_SPARSE_SUPER2) + EXT4_FEATURE_COMPAT_SPARSE_SUPER2|\ + EXT4_FEATURE_COMPAT_STABLE_INODES) #ifdef CONFIG_MMP #define EXT4_LIB_INCOMPAT_MMP EXT4_FEATURE_INCOMPAT_MMP |